Though there is no conclusive evidence (published so far),
I recall of having read Gokul's mail re Thirukkoivilore inscription.
It speaks of a baby - consuming mother's milk - while Vanamadevi ( RRC's mother) committed Sati. This mail is in our archieves.
I think this article is written extensively in tamilartsacademy by Dr. Nagaswamy Sir.
And in case the custom of Queen ( Vanavan Madevi w/o Sundara) being at their Mother's place ( Malayamans of Thirukkoilore) during child birth also continued in the past - there can be speculation that RRC was born at Tirukkoilore !!
If this is actual history - When Aditya was murdered, Sundara Chozha died because he was heart broken. Then it contradicts what KALKI has written. When Aditha Karikalan died Raja Raja was not an infant, he was teen ager